H&K... well... -I- can't prove this. But NASA can, as they can see the earth is round from space. Unless you think they are liars.. hahaha.
Ok so some of the physics you learnt you would have to assume is wrong. For example, light would need to bend away from the flat surface of the earth.
The earth would appear to be a "Globe" from space if it was in fact a "Globe", or if light acted the way stated for it to act. In this case it would also look like a "globe" It would be impossible to get satellites to orbit a flat earth.
Stop for a moment and think why would it be impossible? Cos it wouldnt. It is quite possible to draw a circle on a plate, so why is it impossible on a plane? and whats this "cos metric changes so that you travel an infanitly"? What scientific evidence is this based on other than pulling it out of thin air?
Im afraid there is no scientific evidence to show if the metric changes or stays the same because we only have the metric to messure it with.The only reason its more likly that the world isnt flat, and isnt the centre of the universe, is besause the Math is easier if it isnt. But is cannot be proven not to be a flat plane unless you can be at every point of it at the same time. But to state it as fact, is just faith.